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Re: [Moon] KP4AO on 432 EME

Hi Mike, Of course we are aware that there is no moon window in common between the Arecibo telescope and east/south Asia or Oceania. It s a pity, but that s

Message 1 of 1
, Apr 14, 2010

Hi Mike,

Of course we are aware that there is no moon window in common between
the Arecibo telescope and east/south Asia or Oceania. It's a pity, but
that's the way it is. The 305 m antenna has a maximum operating zenith
angle of 20 degrees, and our allocations of precious telescope time are
determined by moon availability.

-- 73, Joe, K1JT

On 4/14/2010 10:22 AM, M. Watanabe wrote:
> Joe and all,
>
> Joe, thank you for the notice. In US/NA/SA and Europe, you might enjoy
> their primary
> operation with the very strong signal, the big pile-ups, and the arguments
> later.
>
> Unfortunately, the beam tilt of ARECIBO dish does not seem to cover the
> JA window.
> Their mechanical moon window closes before the JA moon-rise.
> This could be the reason why the time schedules does not extend to
> JA-windows.
>
> But is it possible to detect their side-lobe if they try to put the
> side-lobe onto the moon?
> I guess the signals of the possible side-lobe of -20dB could be possible to
> work with.
>
> Anyone can make a comment on this issue?
>
>
> Mike JH1KRC
>
>
>
> -----Original Message-----
> From: moon-bounces@... [mailto:moon-bounces@...] On
> Behalf Of Joe Taylor
> Sent: Monday, April 05, 2010 9:41 AM
> To: moon-net@...; moon@...; Packrats List;
> wsjtgroup@yahoogroups.com
> Subject: [Moon] KP4AO on 432 EME
>
> In less that two weeks the Arecibo Observatory Amateur Radio Club will
> again put the 1000-foot radio telescope on the air for 432 MHz EME.
> The scheduled times of operation are:
>
> April 16: 1645 - 1930 UTC
> April 17: 1740 - 2020 UTC
> April 18: 1840 - 2125 UTC
>
> Callsign: KP4AO
> Tx Frequency: 432.045 MHz
> Rx Frequency: 432.050 to 432.060+
> Tx power: 400 W
> Antenna gain: 60 dBi
> System noise temp: 120 K (cold sky)
> System noise temp: 330 K (when pointed at moon)
>
> KP4AO can be heard with a small hand-held yagi pointed at the moon, and
> a good receiver. A 15 dBi antenna and 100 W will be enough to work us
> on CW.
>
> Operators at KP4AO will do their best to work as many stations as
> possible. Each session will start with a brief announcement and CQ in
> SSB. SSB QSOs may continue for 30 minutes to an hour, if the QSO rate
> remains high. The mode will be shifted to CW as soon as it is judged
> that higher QSO rates would result.
>
> We will listen for calls at frequencies 5-15 kHz higher than our own,
> and even higher if QRM warrants. Callers who s-p-r-e-a-d o-u-t are
> more likely to be copied.
>
> If you've already worked us in any mode, please do not call again --
> give others a chance.
>
> If we call "CQ QRP", we will listen for stations running 100 W or less
> to a single yagi. Please do not answer such a CQ if you are running
> more power or have a larger antenna.
>
> On April 18, if we reach a condition where most calling stations have
> been worked, and we judge that operating in the digital mode JT65B would
> produce a higher QSO rate, we will switch to JT65B.
>
> Note that any of these planned operating strategies may be changed as
> circumstances dictate.
>
> We are extremely fortunate to have been granted access to the world's
> largest radio telescope for this amateur radio good-will event. We look
> forward to working as many stations as possible in the alloted time!
> -- 73 from Joe, K1JT, on behalf of all the gang at KP4AO
>
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